David King is well known & respected for developing/providing bat detectors over a long period of time, commencing at a point when technology was at the early stages of helping to enable our understanding of bat behaviour beyond what had been  available previously. Initially through Stage Electronics, & then BatBox Ltd, David developed 8 bat detectors, a software program (BatScan) & co-authored a book (The Bat Detective). However, there is a lot of things you may not know about him, & here we also take a good look at his wider background.